If you had heard the challenge issued before you became bisexual maybe. However that actually isn't the threshold anyway. The challenge is out to confirmed heterosexuals to become confirmed homosexuals. Not to become bisexual. This is because they (fundies) are making the claim that "Hey guess what we can make you like us! For a moderate fee of course."
Okay, fair enough. It's your game, your rules.
However, I think that to be fair to most of those who would encourage homosexuals to change, the main concern is not, as far as I can tell, removing homosexual attraction
per se, although they may claim that this is possible. Although ex-gay organisations do spend some time on eliminating homosexual attraction, what seems to be being aimed for is a "normal" i.e. heterosexual "lifestyle": a fulfilling relationship with an opposite-sex partner, and the cessation of any homosexual activity whatsoever. In actual fact, it seems likely that most people in favour of conversion therapy for homosexuals don't care whether gay people continue to
be attracted to members of the same sex. What they care about is that they should be able to have a happy heterosexual marriage and be able to remain chaste with regard to homosexual activity.
(If any Christians in favour of conversion therapy would like to correct me about this, please let me know.)
Now given the fact that these people clearly do not believe that it's a quick and easy process to "kick the habit", as it were, of being a gay person - otherwise they obviously wouldn't recommend therapy, they'd just tell people to buck their ideas up - I think it's reasonable to conclude that they don't view homosexual activity as a choice in the sense that people wake up one day and decide to be gay. I should think they rather consider it a choice in the sense that becoming addicted to cigarettes is a choice: you choose to smoke the first few cigarettes, you choose to purchase more cigarettes, you choose to hang around with other smokers, &c. The fact that it was a choice in this sense doesn't mean that people decide to become addicted. But they do choose the initial steps towards addiction, and, crucially, they choose not to give up.
If I'm correct about this, then within this paradigm I can see several actually quite good reasons that people might not want to participate in your challenge. The first one is that if you consider homosexual activity to be psychologically and/or physically harmful then you may well be reluctant to try it, just as I am very reluctant to smoke a cigarette on the grounds that it is bad for my body. I am also reluctant to smoke a cigarette because I know that cigarettes have a track record of being addictive. Similarly, a second reason not to participate: if you understand "the homosexual lifestyle" to be addictive, it would not be entirely surprising that you would want to avoid venturing anywhere near it.
Now I might hasten to add that I neither consider homosexuality to be an addiction and nor do I consider it to be harmful. I think these people are wrong about how homosexual orientation is acquired for most people and also about the ethical and health status of homosexuality. But I think it is always wise to attempt to address disagreements at their root.
He didn't become homosexual just bisexual. In order for the phobes' rationale to stand up he would have to have become fully gay as they are claiming homosexuals can become fully straight.
Still waiting for you to change
Oi! I'm a girl!